Zeitschriftenartikel: „Physicochemical methodology“

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Franchini, C. A., T. L. Oliveira, W. G. Teixeira, A. Kuznetsov und C. A. Achete. „Phase separation methodology for physicochemical studies of soils“. Journal of Physics: Conference Series 575 (06.01.2015): 012037. http://dx.doi.org/10.1088/1742-6596/575/1/012037.

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DeWitte, Robert S., und Russell H. Robins. „A hierarchical screening methodology for physicochemical/ADME/Tox profiling“. Expert Opinion on Drug Metabolism & Toxicology 2, Nr. 5 (Oktober 2006): 805–17. http://dx.doi.org/10.1517/17425255.2.5.805.

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Niemczewska-Wójcik, Magdalena, und Magdalena A. Osiewicz. „CONCEPT FOR AN ADVANCED TRIBOLOGICAL SYSTEMS RESEARCH METHODOLOGY“. Tribologia 301, Nr. 3 (30.11.2022): 69–77. http://dx.doi.org/10.5604/01.3001.0016.1035.

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The conduct of research on advanced tribological systems in order to determine the best solutions in terms of the durability and reliability of technical objects containing these systems requires a multifaceted and comprehensive approach due to the complexity of tribological processes occurring during operation. Observation of these processes is complicated and limited due to the inaccessibility of the friction zone. Therefore, progress in improving tribological characteristics is mainly determined by developing laboratory test methods. From the point of view of describing the tribological properties of the surface layer, the geometric structure of the surface (shape, waviness, roughness and surface defects), the structure of the physicochemical zones (microstructure, mechanical properties, physicochemical properties), and the ability to properly interact with the lubricant should be taken into account. Studies of advanced tribological systems should therefore include two complementary test methods, i.e., friction wear tests and surface layer tests (as manufactured and as operated). This paper presents a concept for research on advanced tribological systems and a justification for conducting complementary research on these systems, referring to selected examples (processing tools, joint implants, and dental implants). The research results are examples which illustrate the essence of conducting complementary research.

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Basak, Bikram, Biswanath Bhunia, Suprabhat Mukherjee und Apurba Dey. „Optimization of physicochemical parameters for phenol biodegradation byCandida tropicalisPHB5 using Taguchi Methodology“. Desalination and Water Treatment 51, Nr. 34-36 (08.03.2013): 6846–62. http://dx.doi.org/10.1080/19443994.2013.770638.

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Angelopoulos, Panagiotis M. „Insights in the Physicochemical and Mechanical Properties and Characterization Methodology of Perlites“. Minerals 14, Nr. 1 (22.01.2024): 113. http://dx.doi.org/10.3390/min14010113.

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Perlite is a volcanic glass that, under thermal treatment, expands, producing a highly porous and lightweight granular material which finds application in the construction, horticulture, insulation and other industrial sectors. Proper control of the feed properties and the expansion conditions allows the production of purpose-oriented grades, while the primary evaluation of its appropriateness for use in each sector is performed by the proper characterization of relevant physical, thermal or/and mechanical properties. However, due to its extreme fineness, low density, and friability, most of the available characterization methods either fail in testing or provide erroneous results, while for certain properties of interest, a method is still missing. As a consequence, the way towards the evaluation of the material is rife with uncertainties, while a well-defined methodology for the characterization of the critical properties is of practical importance towards the establishment of a pathway for its proper analysis and assessment. This article presents the available methodology for determining the main properties of interest, i.e., the size and density, water repellency/absorption and oil absorption, the microstructural composition, crushing and abrasion resistance and isostatic crushing strength, and also sampling and size reduction processes. The issues raised by the application of existing methods are analyzed and discussed, ending up to a proper methodology for the characterization of each property, based on the long-term experience of the Perlite Institute. The study is supplemented by updated insights on ore genesis, physicochemical properties, mineralogical composition and the expansion mechanism, as background information for the sufficient comprehension of the nature and properties of perlite.

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Wan Sulaiman, Wan Syibrah Hanisah, Rashidi Othman, Nur Hanie Abd Latiff, Razanah Ramya und Farah Ayuni Mohd Hatta. „Physicochemical Properties for Toyyib Environmental Assessment on Lake Water Quality: A Mini Review“. Halalpshere 3, Nr. 1 (31.01.2023): 31–39. http://dx.doi.org/10.31436/hs.v3i1.67.

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As Malaysia strives to become industrialised, numerous water bodies are increasingly dumping grounds for chemicals, sewage, and pollutants. It is considered that pollutant substances are continuously channelled into water bodies and then transferred into organic and inorganic particles, nutrients, pesticides, and herbicides that directly affect the aquatic ecosystem. This paper aims to study the overview of physicochemicals properties for lake water quality in relation to Toyyib environmental assessment. Malaysian water quality assessments are based on several rules, including the National Lake Water Quality Criteria and Standard, Urban Storm Water Management Manual for Malaysia, and National Water Quality Index Standard. As a result of the transmission of physicochemical qualities, water contaminants inflict harm not only on aquatic ecosystems but also on the safe water for human use. These studies indicate the water quality measurements or parameters for assessing the water quality for the Toyyib environment and establish the list of physicochemical properties for water quality assessment on the lake. On the other hand, the methodology applied for each parameter was also studied and presented.

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Bartczak, Dorota, Julie Davies, Christian Gollwitzer, Michael Krumrey und Heidi Goenaga-Infante. „Changes in silica nanoparticles upon internalisation by cells: size, aggregation/agglomeration state, mass- and number-based concentrations“. Toxicology Research 7, Nr. 2 (2018): 172–81. http://dx.doi.org/10.1039/c7tx00323d.

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Kędzierska, Magdalena, Piotr Potemski, Anna Drabczyk, Sonia Kudłacik-Kramarczyk, Magdalena Głąb, Beata Grabowska, Dariusz Mierzwiński und Bożena Tyliszczak. „The Synthesis Methodology of PEGylated Fe3O4@Ag Nanoparticles Supported by Their Physicochemical Evaluation“. Molecules 26, Nr. 6 (20.03.2021): 1744. http://dx.doi.org/10.3390/molecules26061744.

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Many investigations are currently being performed to develop the effective synthesis methodology of magnetic nanoparticles with appropriately functionalized surfaces. Here, the novelty of the presented work involves the preparation of nano-sized PEGylated Fe3O4@Ag particles, i.e., the main purpose was the synthesis of magnetic nanoparticles with a functionalized surface. Firstly, Fe3O4 particles were prepared via the Massart process. Next, Ag+ reduction was conducted in the presence of Fe3O4 particles to form a nanosilver coating. The reaction was performed with arabic gum as a stabilizing agent. Sound energy-using sonication was applied to disintegrate the particles’ agglomerates. Next, the PEGylation process aimed at the formation of a coating on the particles’ surface using PEG (poly(ethylene glycol)) has been performed. It was proved that the arabic gum limited the agglomeration of nanoparticles, which was probably caused by the steric effect caused by the branched compounds from the stabilizer that adsorbed on the surface of nanoparticles. This effect was also enhanced by the electrostatic repulsions. The process of sonication caused the disintegration of aggregates. Formation of iron (II, III) oxide with a cubic structure was proved by diffraction peaks. Formation of a nanosilver coating on the Fe3O4 nanoparticles was confirmed by diffraction peaks with 2θ values 38.15° and 44.35°. PEG coating on the particles’ surface was proven via FT-IR (Fourier Transform Infrared Spectroscopy) analysis. Obtained PEG–nanosilver-coated Fe3O4 nanoparticles may find applications as carriers for targeted drug delivery using an external magnetic field.

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Granato, Daniel, Jéssica Caroline Bigaski Ribeiro, Inar Alves Castro und Maria Lucia Masson. „Sensory evaluation and physicochemical optimisation of soy-based desserts using response surface methodology“. Food Chemistry 121, Nr. 3 (August 2010): 899–906. http://dx.doi.org/10.1016/j.foodchem.2010.01.014.

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Patrón Mejía, Carmelina, und Carlos Mario Durango Yepes. „Case Analysis: Financial viability for the commercialization of physicochemical testing services at the Antioquia Liquor and Alcohol Factory (ALAF)“. Cuadernos de Administración 37, Nr. 71 (08.10.2021): e2110690. http://dx.doi.org/10.25100/cdea.v37i71.10690.

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The purpose of this work is to evaluate the profitability of the market for physicochemical testing of alcoholic beverages, which the Physicochemical Laboratory of the Liquor de Antioquia Factory (FLA) intends to enter, according to the transformation in its legal nature. The methodology that includes the costing of the tests using cost accounting and the analytical procedures used by the laboratory. For the construction of the cash flow of the project for the sale of the physicochemical tests, it was necessary to search and consolidate information concerning the inventory of fixed assets of the laboratory and the entry of annual samples from the different areas of the FLA. The AutoRegressive Moving Average (ARMA) model is used as the demand projection method. The results reveal that, although restricted and specialized, the physicochemical testing market may generate, under certain scenarios, a return on investment that allows the self-sustainability, viability and competitiveness of the physicochemical laboratory over time.

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Amare, Constance, Olivier Mantaux, Arnaud Gillet, Matthieu Pedros und Eric Lacoste. „Innovative test methodology for shelf life extension of carbon fibre prepregs“. IOP Conference Series: Materials Science and Engineering 1226, Nr. 1 (01.02.2022): 012101. http://dx.doi.org/10.1088/1757-899x/1226/1/012101.

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Abstract The aerospace industry makes extensive use of composite materials in the form of fibre fabrics pre-impregnated with thermosetting resin, called prepregs. In order to minimize the resin polymerization before curing, prepregs must be stored at -18°C (0°F). There are therefore expiration dates for prepregs before use. Although manufacturers try to minimize storage time, offcuts and time out of the freezer, it is estimated that 30% to 40% of the prepregs are not used [1]. Today, recertification of expired materials is still complex and expensive, therefore it is generally chosen to send expired prepregs to landfill. The purpose of this work is to correlate physicochemical measurements with the loss of mechanical performance in order to point out and measure the real aging effects during excessive storage time. Processability, physicochemical and mechanical tests were performed in order to understand which tests are truly representative of ageing. This study was illustrated by testing on unidirectional Hexcel carbon/epoxy prepreg. Different expiry dates of this material were studied and the properties were compared. It was shown that the main observed degradation was the processability of the prepreg while mechanical performance was minimally degraded after the expiry date. This study could lead to a simpler measurement of the actual expiry rate of prepregs, which could be useful to speed up recertification procedures or to propose new scenarios to extend the shelf-life of expired prepregs [2].

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Doğan, H., und M. V. Karwe. „Physicochemical Properties of Quinoa Extrudates“. Food Science and Technology International 9, Nr. 2 (April 2003): 101–14. http://dx.doi.org/10.1177/1082013203009002006.

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Response surface methodology (RSM) was used to analyse the effect of temperature, screw speed, and feed moisture content on physicochemical properties of quinoa extrudates. A three-level, three-variable, Box-Behnken design of experiments was used. The experiments were run at 16-24% feed moisture content, 130-170°C temperature, and 250-500 rpm screw speed with a fixed feed rate of 300 g/min. Second order polynomials were used to model the extruder response and extrudate properties as a function of process variables. Responses were most affected by changes in feed moisture content and temperature, and to a lesser extent by screw speed. Calculated specific mechanical energy (SME) values ranged between 170-402 kJ/kg which were lower than those observed for other cereals, most likely due to high (7.2%) fat content of quinoa. High levels of feed moisture alone, and in combination with high temperature, resulted in poor expansion. The best product, characterised by maximum expansion, minimum density, high degree of gelatinization and low water solubility index, was obtained at 16% feed moisture content, 130°C die temperature, and 375 rpm screw speed, which corresponds to high SME input. It was demonstrated that the pseudo-cereal quinoa can be used to make novel, healthy, extruded, snack-type food products.

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Wei, Fengyu, Bo Wu, Jincheng Zhang und Wanting Zhang. „Modification of abandoned fine blue-coke: optimization study on removal of p-nitrophenol using response surface methodology“. RSC Advances 6, Nr. 16 (2016): 13537–47. http://dx.doi.org/10.1039/c5ra24847g.

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Abandoned fine blue-coke was modified with a physicochemical method including nitric acid (HNO₃) treatment and nitrogen gas (N₂) calcination, and used as an adsorbent for p-nitrophenol (PNP) removal.

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Babirye, Sheilah. „Physicochemical Properties and Functionalities of Food Emulsifiers“. Journal of Food Sciences 6, Nr. 1 (01.05.2024): 1–13. http://dx.doi.org/10.47941/jfs.1849.

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Purpose: This study sought to analyze the physiochemical properties and functionalities of food emulsifiers. Methodology: The study adopted a desktop research methodology. Desk research refers to secondary data or that which can be collected without fieldwork. Desk research is basically involved in collecting data from existing resources hence it is often considered a low cost technique as compared to field research, as the main cost is involved in executive’s time, telephone charges and directories. Thus, the study relied on already published studies, reports and statistics. This secondary data was easily accessed through the online journals and library. Findings: The findings reveal that there exists a contextual and methodological gap relating to the physiochemical properties and functionalities of food emulsifiers. Preliminary empirical review revealed that the importance of considering emulsifier properties in food product development. The findings underscored the significance of optimizing emulsifier selection and formulation to meet consumer demands for healthier, more sustainable, and better-performing food products. Continued research in this area promises to drive further innovation and advancements in food technology. Unique Contribution to Theory, Practice and Policy: The Interfacial Tension theory, HLB (Hydrophilic- Lipophilic Balance) theory and Emulsion Phase Inversion theory may be used to anchor future studies on the physiochemical properties and functionalities of food emulsifiers. The study made significant contributions to theoretical understanding, practical application, and policy considerations in the field of food science and technology. It advanced theoretical knowledge by exploring molecular mechanisms and integrating principles from colloid and interface science. In practice, the study recommended systematic approaches for emulsifier selection and process optimization to enhance product quality and consistency. From a policy perspective, it emphasized the importance of regulatory guidelines and transparency in emulsifier usage. Additionally, the study advocated for sustainability, innovation, and consumer-centric approaches to promote environmental responsibility, drive technological advancements, and prioritize consumer well-being in emulsifier research and application.

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Baldrich Ferrer, Carlos A. „PREDICTION OF PHYSICOCHEMICAL PROPERTIES OF FCC FEEDSTOCK BY CHEMOMETRIC ANALYSIS OF THEIR ULTRAVIOLET SPECTRUM“. CT&F - Ciencia, Tecnología y Futuro 3, Nr. 4 (31.12.2008): 143–56. http://dx.doi.org/10.29047/01225383.468.

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Chemometric analysis by Partial Least Squares (PLS) has been applied in this work to correlate the ultraviolet spectrum of combined Fluid Catalytic Cracking (FCC) feedstocks with their physicochemical properties. The prediction errors obtained in the validation process using refinery samples demonstrate the accuracy of the predicted properties. This new analytical methodology allows obtaining in one analysis detailed information about the most important physicochemical properties of FCC feedstocks and could be used as a valuable tool for operational analysis.

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Hamieh, Tayssir. „New Physicochemical Methodology for the Determination of the Surface Thermodynamic Properties of Solid Particles“. AppliedChem 3, Nr. 2 (10.05.2023): 229–55. http://dx.doi.org/10.3390/appliedchem3020015.

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The study of the surface thermodynamic properties of solid materials is primordial for the determination of the dispersive surface energy, polar enthalpy of adsorption and Lewis’s acid base properties of solid particles. The inverse gas chromatography technique (IGC) at infinite dilution is the best surface technique for the determination of the surface physicochemical properties of materials. (1) Background: This paper was devoted to studying the surface properties of solid materials, such as alumina, titania and silica particles, using the IGC technique. (2) Methods: Different methods and molecular models, such as the spherical, cylindrical, Van der Waals, Redlich–Kwong, Kiselev and geometric models, were used to determine the London dispersive surface energy of solid surfaces. The Hamieh model was also used and highlighted the thermal effect on the surface area of solvents. (3) Results: The variations of the dispersive surface energy and the free energy of adsorption were determined for solid particles as a function of the temperature, as well as their Lewis’s acid base constants. Alumina surfaces were proved to exhibit a strong Lewis amphoteric character three times more basic than acidic, titanium dioxide more strongly basic than acidic and silica surface exhibited the stronger acidity. (4) Conclusions: The new methodology, based on the Hamieh model, gave the more accurate results of the physicochemical properties of the particle surfaces.

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Yang, T. C., J. H. Wu, T. Noguchi und M. Isshiki. „Methodology of accelerated weathering test through physicochemical analysis for polymeric materials in building construction“. Materials Research Innovations 18, sup3 (Mai 2014): S3–91—S3–95. http://dx.doi.org/10.1179/1432891714z.000000000587.

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Cheng, Lifeng, Shengwen Duan, Xiangyuan Feng, Ke Zheng, Qi Yang, Zhiyuan Liu und Yuande Peng. „Optimization of Pectin Extraction from Ramie by Orthogonal Methodology and Its Partial Physicochemical Properties“. Nanoscience and Nanotechnology Letters 11, Nr. 11 (01.11.2019): 1607–11. http://dx.doi.org/10.1166/nnl.2019.3034.

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Pectin was extracted from Ramie [Boehmeria nivea (L.) Gaud] through ammonium oxalate extraction method. The influences of single factors (ammonium oxalate concentration, extraction time, solid–liquid ratio, and reaction temperature) on the yield of ramie pectin were studied. Orthogonal experiment was then performed to optimize the combination of the given conditions using pectin yield as the measuring indicator. Finally, the partial physicochemical properties of ramie pectin extracted in the optimal conditions were analyzed. Results showed that the optimal conditions for single-element experiment were 3.5 h (extraction time), 1:25 (solid–liquid ratio), 0.85% (concentration of ammonium oxalate) and 95 °C (extraction temperature), and that the optimal combination conditions for orthogonal experiment was 4 h, 1:30, 0.95% and 90 °C. The ramie pectin yield extracted in optimal conditions reached 15.81%, and its protein content, galacturonic acid content, and esterification degree were 0.659 mg/g, 49.92%, and 53.11%, respectively. Therefore, the proposed method was successfully applied to obtain ramie pectin and may provide scientific basis for improving the multi-utilization value of ramie.

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Favvas, E. P., G. E. Romanos, S. K. Papageorgiou, F. K. Katsaros, A. Ch Mitropoulos und N. K. Kanellopoulos. „A methodology for the morphological and physicochemical characterisation of asymmetric carbon hollow fiber membranes“. Journal of Membrane Science 375, Nr. 1-2 (Juni 2011): 113–23. http://dx.doi.org/10.1016/j.memsci.2011.03.028.

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Umar, Khadijah Aminu, Ahmad Akanbi Adedo, Aminu Muhammad, Ahmad Sa'eed, Abdulladif Muhammad, AbdulHakeem AbdulLateef, Ibrahim Auwal Gama und Husseini Tijani. „PTIMIZATION AND CHARACTERIZATION OF USED COOKING OIL FOR BIODIESEL PRODUCTION USING RESPONSE SURFACE METHODOLOGY“. FUDMA JOURNAL OF SCIENCES 7, Nr. 6 (30.12.2023): 234–40. http://dx.doi.org/10.33003/fjs-2023-0706-2081.

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This study focuses on optimizing and characterizing alkali-catalyzed biodiesel production from used cooking oil. Transesterification using potassium hydroxide (KOH) and methanol, followed by solvent-solvent extraction, yielded biodiesel. Physicochemical analysis of the used cooking oil revealed an acid value of 29 mgNaOH/g, free fatty acid (FFA) value of 14.5, and density of 0.91 g/cm3. The high FFA content suggests the use of a heterogeneous catalyst. Optimization parameters included alcohol-to-oil ratio, catalyst concentration, reaction temperature, and time, employing Response Surface Methodology (RSM) based on Central Composite Design (CCD). Optimal conditions for biodiesel production were determined at a reaction temperature of 60°C, a reaction time of 60 minutes, 0.3g KOH catalyst concentration, and a 3:20 methanol-to-oil ratio, predicting a 100% yield. Physiochemical properties of the produced biodiesel indicated specific gravity and pH values of 0.891 and 7.60, respectively. Biodiesel blends (B100, B80, and B20) exhibited specific gravity and pH values of 0.891, 0.842, and 0.839, and 7.60, 7.81, and 5.5, respectively. Comparative analysis with diesel suggests the biodiesel's suitability for standalone or blended use in diesel engines. Characterization involved physicochemical analysis, Fourier Transform Infrared Spectroscopy (FTIR), and Thin Layer Chromatography (TLC). Overall, the optimized process presented a viable and efficient approach to producing biodiesel from used cooking oil with favourable fuel properties

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Ngomade, Serges Bruno Lemoupi, Raoul Donald Tchuifon Tchuifon, Rufis Fregue Tiegam Tagne, Meme Laloi Tongnang Ngueteu, Hugues Mahouli Patai, George Ndifor-Angwafor Nche und Solomon Gabche Anagho. „Optimization by Response Surface Methodology of Biodiesel Production from Podocarpus falcatus Oil as a Cameroonian Novel Nonedible Feedstock“. Journal of Chemistry 2022 (04.04.2022): 1–14. http://dx.doi.org/10.1155/2022/3786602.

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The production of methyl esters (biodiesel) by the transesterification of Podocarpus falcatus oil (PFO) with methanol was optimized by response surface methodology (RSM) using the Box-Behnken design. The effects of parameters such as temperature, reaction time, and alcohol/oil molar ratio using yield and viscosity as responses were investigated. The optimum conditions for the production of biodiesel were as follows: temperature at 65°C, reaction time of 180 min, and molar ratio of 10 : 1, while the minimum viscosity was obtained for a temperature of 50°C, a reaction time of 120 min, and a molar ratio of 10 : 1. Physicochemical characterization by infrared spectroscopy (FT-IR) and UV visible spectroscopy showed that the free fatty acid (FFA) content of Podocarpus oil was 1.9%, which is less than the maximum of 2% recommended for the application of the one-step alkaline transesterification process. Also, the biodiesel obtained from the oil was seen to consist mainly of methyl esters, and that its physicochemical characteristics are within the standard set by the American Standard for Testing and Materials (ASTM).

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Ahmady-Asbchin, Salman. „Response surface methodology for cadmium biosorption on Pseudomonas aeruginosa“. Water Science and Technology 73, Nr. 11 (19.02.2016): 2608–15. http://dx.doi.org/10.2166/wst.2016.061.

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In this research the effects of various physicochemical factors on Cd2+ biosorption such as initial metal concentration, pH and contact exposure time were studied. This study has shown a Cd2+ biosorption, equilibrium time of about 5 min for Pseudomonas aeruginosa and the adsorption equilibrium data were well described by Langmuir equation. The maximum capacity for biosorption has been extrapolated to 0.56 mmol.g−1 for P. aeruginosa. The thermodynamic properties ΔG0, ΔH0, and ΔS0 of Cd2+ for biosorption were analyzed by the equilibrium constant value obtained from experimented data at different temperatures. The results show that biosorption of Cd2+ by P. aeruginosa are endothermic and spontaneous with ΔH value of 36.35 J.mol−1. By response surface methodology, the quadratic model has adequately described the experimental data based on the adjusted determination coefficient (R2 = 0.98). The optimum conditions for maximum uptake onto the biosorbent were established at 0.5 g.l−1 biosorbent concentration, pH 6 for the aqueous solution, and a temperature of 30 °C.

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Karimifard, Shahab, und Mohammad Reza Alavi Moghaddam. „Application of response surface methodology in physicochemical removal of dyes from wastewater: A critical review“. Science of The Total Environment 640-641 (November 2018): 772–97. http://dx.doi.org/10.1016/j.scitotenv.2018.05.355.

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BenJemaa, Mariem, Fatma Zohra Rahali, Hanen Falleh, Raja Beji-Serairi, Wided Megdiche-Ksouri, Ibtissem Hamrouni, Majdi Hammami et al. „Essential Oil Stabilisation by Response Surface Methodology (RSM): Nanoemulsion Formulation, Physicochemical, Microbiological, and Sensory Investigations“. Molecules 27, Nr. 21 (28.10.2022): 7330. http://dx.doi.org/10.3390/molecules27217330.

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This manuscript aimed to optimise the encapsulation of Thymus capitatus essential oil into nanoemulsion. Response Surface Methodology results were best fitted into polynomial models with regression coefficient values of more than 0.95. The optimal nanoemulsion showed nanometer-sized droplets (380 nm), a polydispersity index less than 0.5, and a suitable Zeta potential (−10.3 mV). Stability results showed that nanoemulsions stored at 4 °C were stable with the lowest d3,2, PolyDispersity Index (PDI), and pH (day 11). Significant ameliorations in the capacity to neutralise DPPH radical after the encapsulation of the antimicrobial efficacy of thyme essential oil were recorded. S. typhimurium growth inhibition generated by nanoencapsulated thyme essential oil was 17 times higher than by bulk essential oil. The sensory analysis highlighted that the encapsulation of thyme essential oil improved enriched milk’s sensory appreciation. Indeed, 20% of the total population attributed a score of 4 and 5 on the scale used for milk enriched with nanoemulsion. In comparison, only 11% attributed the same score to milk enriched with bulk essential oil. The novel nanometric delivery system presents significant interest for agroalimentary industries.

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Hou, Feina, Taihua Mu, Mengmei Ma und Christophe Blecker. „Optimization of processing technology using response surface methodology and physicochemical properties of roasted sweet potato“. Food Chemistry 278 (April 2019): 136–43. http://dx.doi.org/10.1016/j.foodchem.2018.11.034.

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Ike, Charles. „Physicochemical Properties and Rheological Behavior of Gluten-Free Flour Blends for Bakery Products“. Journal of Food Sciences 5, Nr. 1 (30.04.2024): 43–55. http://dx.doi.org/10.47941/jfs.1842.

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Purpose: The general aim of the study was to investigate the physicochemical properties and rheological behavior of gluten-free flour blends for bakery products. Methodology: The study adopted a desktop research methodology. Desk research refers to secondary data or that which can be collected without fieldwork. Desk research is basically involved in collecting data from existing resources hence it is often considered a low cost technique as compared to field research, as the main cost is involved in executive’s time, telephone charges and directories. Thus, the study relied on already published studies, reports and statistics. This secondary data was easily accessed through the online journals and library. Findings: The findings reveal that there exists a contextual and methodological gap relating to physicochemical properties and rheological behavior of gluten-free flour blends for bakery products. Preliminary empirical review revealed that hydrocolloids such as xanthan gum and guar gum significantly improved dough viscoelasticity, texture, and stability, while the efficacy of carrageenan was limited. Optimizing the concentrations and combinations of hydrocolloids was deemed essential for achieving superior rheological properties. Additionally, the study emphasized the importance of considering physicochemical properties alongside rheological behavior to develop gluten-free bakery products that meet consumer expectations. Overall, the findings highlighted the complexity of gluten-free baking and underscored the need for a multidimensional approach integrating physicochemical analyses with rheological assessments. Unique Contribution to Theory, Practice and Policy: The Food Material Science theory, Rheology theory and Biopolymer theory may be used to anchor future studies on physicochemical properties and rheological behavior of gluten-free flour blends. The study provided valuable recommendations. It contributed to theory by exploring the effects of various hydrocolloids on dough properties, highlighting the importance of xanthan gum and guar gum in improving dough viscoelasticity. In practice, it suggested optimizing hydrocolloid concentrations for superior rheological properties in gluten-free bakery products. Moreover, the study offered insights for policy-makers regarding the formulation of gluten-free bread to meet quality standards. Overall, the research advanced understanding in the field and provided practical guidelines for industry and policymakers.

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Taverna, Myriam, Arlette E. Baillet und Danielle Baylocq. „Methodology for Evaluation of Compatibilities of Cosmetic Perfumes and Plastic Containers“. Journal of AOAC INTERNATIONAL 73, Nr. 2 (01.03.1990): 206–10. http://dx.doi.org/10.1093/jaoac/73.2.206.

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Abstract The study was designed to investigate compatibility of plastic containers and perfumes. First, a gas chromatographic/ mass spectrometric (GC/MS) system was developed for identification of fragrance components. Then a quantitative extraction and GC analysis was developed. Honeysuckle fragrance was added to a cosmetic emulsion at 0.5 mg/100 mg level. The cosmetic was stored for 2 months at 37° C in 6 different plastic containers and in a glass bottle as a test control. The cosmetic was extracted with dichloromethane and analyzed by GC. The results obtained after storage were compared with the original analysis and showed an important loss of some perfume components stored in different plastic containers. Sorption of these components was then studied by extracting components fixed by the plastic; some of the physicochemical factors involved in such interactions are identified.

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Bazrafshan, Zahra, Maryam Ataeefard und Farahnaz Nourmohammadian. „Physicochemical colourants effects on polymeric composites printing toner“. Pigment & Resin Technology 43, Nr. 5 (26.08.2014): 245–50. http://dx.doi.org/10.1108/prt-09-2013-0085.

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Purpose – This paper aims to report on production of the colour digital printing toners cyan, magenta and yellow. Colour digital electrophotographic printing is currently in high demand. The provision of a large colour gamut depends on appropriate selection of precise colourants to produce toner capable of producing a thin layer on paper. Design/methodology/approach – Printing toners were synthesised by the emulsion aggregation method, and then evaluated for chemical constitution and effects of the colourant substituents. Findings – Results demonstrated that increasing the polarity of a pigment produced better dispersion and lower particle size with narrower distribution and even better colour reproduction. While, changing a pigment’s characteristics did not affect the toner shape or its thermal properties. Practical implications – The developed method provides a simple way to synthesise colour printing toner. Social implications – Emulsion aggregation toners provide less hazardous materials during printing. Originality/value – Evaluations of the influence of solid-state parameters and physicochemical properties of the pigments on printing toner characteristics were done for the first time.

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Mei, Alessandro, Alfonso Valerio Ragazzo, Elena Rantica und Giuliano Fontinovo. „Statistics and 3D Modelling on Soil Analysis by Using Unmanned Aircraft Systems and Laboratory Data for a Low-Cost Precision Agriculture Approach“. AgriEngineering 5, Nr. 3 (30.08.2023): 1448–68. http://dx.doi.org/10.3390/agriengineering5030090.

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The aim of this work was to elaborate a new methodology that can allow for the identification of the topsoil homogeneous area (tSHA) distribution along land parcels, supporting farmers in keeping low-cost, sustainable, and light logistic management of precision agriculture (PA) practices. This paper shows the assessment of tSHA variability over two production units (PUs), considering radiometric response (optical camera), physicochemical (texture, pH, electrical conductivity), and statistical and geostatistical data analysis. By using unmanned aircraft systems (UASs) and laboratory analysis, our results revealed that the integration between UAS-RGB and physicochemical data can improve the estimation accuracy of tSHA distribution. Firstly, the UAS-RGB dataset was used to isolate bare soil from the vegetative radiometric contribution. Secondly, starting from statistical approaches (correlation matrices), the highest correlation with UAS-RGB and physicochemical data was stated. Thirdly, by using a geostatistical approach (ordinary cokriging), the map representing the tSHA variability was finally obtained.

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García-Alamilla, Pedro, Laura Mercedes Lagunes-Gálvez, Juan Barajas-Fernández und Ricardo García-Alamilla. „Physicochemical Changes of Cocoa Beans during Roasting Process“. Journal of Food Quality 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/2969324.

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During cocoa beans roasting, there are physicochemical changes that develop the chocolate quality attributes. Roasting systems have a particular influence on the development of these characteristics, and the effects of operation variables for each system must be evaluated. The objective of this study was to evaluate the effect of roasting time and temperature in a rotatory system on cocoa beans physicochemical parameters of quality as moisture, water activity, pH, total acidity, color (L⁎,a⁎,b⁎), total phenolic content (TPC), and DPPH radical capacity. Cocoa beans were roasted as a function with a central rotatable design with 22 + 5 central points and 4 axial points (-1.414, -1, 0, +1, and +1,414) and a response surface methodology was applied. Temperature and time levels were 110–170°C and 5–65 minutes, respectively. The effect of the variables was nonlinear and modeled with a second-order response polynomial. Roasting time and temperature presented a significative effect (p<0.05) on the response variables except for both TPC and DPPH radical capacity in aqueous extract.

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Domingos, Domingos Afonso, Abel Alberto Massingue Júnior, Ezequiel Carlitos Mutie, José Sarmento Bunga, Angélica Agostinho Machalela und António Elísio José. „Physicochemical Properties of SWEET Potato Chips (Ipomoea batatas)“. Asian Food Science Journal 22, Nr. 11 (09.12.2023): 10–23. http://dx.doi.org/10.9734/afsj/2023/v22i11682.

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Aims: The study aimed to produce and characterize sweet potato-based chips, focusing on pH, titratable acidity, moisture, ash, fat, protein, carbohydrates, and calorific value. Sensory quality was assessed using acceptance tests. Study Design: The research followed an experimental design with four formulations of sweet potato chips. Methodology: Four different formulations of sweet potato chips were prepared, varying in the addition of ingredients such as sodium chloride and spice seasoning. Various chemical analyses were conducted to determine the nutritional content of the chips, and sensory evaluations were performed. Results: The study found differences in pH, moisture, carbohydrates, proteins, lipids, ash, titratable acidity, and calorific value among the different chip formulations. However, there were no significant differences in terms of moisture, protein, and titratable acidity. Formulations (B) and (C) achieved a 70 percent acceptance rate in sensory evaluations. Conclusion: Sweet potato chips offer an alternative way to enjoy the nutritional benefits of sweet potatoes. The study provides insights into the composition and sensory acceptability of different chip formulations, which can guide future product development.

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Weldemichael, Helen, Shimelis Admassu und Melaku Alemu. „Optimization of Enset Fermentation in the Production of Kocho Using Response Surface Methodology“. Acta Universitatis Cibiniensis. Series E: Food Technology 22, Nr. 2 (01.12.2018): 67–75. http://dx.doi.org/10.2478/aucft-2018-0014.

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Abstract Response surface methodology (RSM) was used for optimization of enset fermentation process. Two numerical (time and amount of starter culture) and one categorical variable (types of starter strain) was used for evaluation of sensory quality of kocho. The physicochemical properties, proximate composition and color of kocho product were also analyzed. It was found that the coefficient of determination (R2) of the response variables were greater than 80% described that high percentage of the variability was defined by the model. These findings revealed that fermentation time, amount of starter culture and types of starter strain affected the sensory attributes of kocho. The preferred sensory quality of kocho was produced using 2% L. plantarum as starter strain at 6 days of fermentation time.

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Fuentes-Bedoya, Eliana Andrea, Joana Paola González-Hernández, Claudia Denise De Paula, Mónica María Simanca-Sotelo und Ricardo David Andrade Pizarro. „Physicochemical characteristics and textural properties of the casabe“. Investigación e Innovación en Ingenierías 11, Nr. 2 (17.10.2023): 39–48. http://dx.doi.org/10.17081/invinno.11.2.6449.

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Objective: The objective of this research was to determine the effect of the casabe production process on the final characteristics of the product. For this purpose, three small family businesses were chosen from Ciénaga de Oro, Córdoba (Colombia). Methodology: Physicochemical and textural characterization of the casabe produced was carried out. Descriptive analysis of the texture was performed with a trained panel of tasters, evaluating attributes of hardness, fracturability, crispness, and cohesiveness. Instrumental analyses of texture were conducted with a texture analyzer to determine hardness and fracturability. Results: The results revealed differences between the artisan casabe in terms of physicochemical characteristics (moisture and carbohydrates), sensory texture, and instrumental texture (hardness). No correlation could be established between the texture data evaluated instrumentally and sensorially. The differences in the characteristics of the casabe produced in the small family business are due to the discrepancy between the production processes, giving each casabe specific qualities. Conclusions: casabe can be defined as a hard and fractured product when consumed. These attributes can be considered the primary tool when determining quality as they are important characteristics of consumer acceptance. However, instrumental texture (hardness and fracturability) does not correlate with sensory texture.

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Salhi, Dorra, Sarra Jrıbı, Sonia Boudiche, Souraya Kaabia und Hajer Debbabi. „Optimization of Low-fat Butter Using Response Surface Methodology: Effect on Physicochemical Properties and Consumers' Acceptance“. International Journal of Innovative Approaches in Agricultural Research 3, Nr. 2 (30.06.2019): 217–28. http://dx.doi.org/10.29329/ijiaar.2019.194.8.

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Sindhu, Raveendran, Mathiyazhakan Kuttiraja, Parameswaran Binod, Rajeev Kumar Sukumaran und Ashok Pandey. „Physicochemical characterization of alkali pretreated sugarcane tops and optimization of enzymatic saccharification using response surface methodology“. Renewable Energy 62 (Februar 2014): 362–68. http://dx.doi.org/10.1016/j.renene.2013.07.041.

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Türker, İzzet, Sedanur Daştan und Hilal İşleroğlu. „Alkali Extraction of Dietary Fiber from Trigonella-foenum graecum L. Seeds (Dietary Fiber of Fenugreek Seeds)“. Turkish Journal of Agriculture - Food Science and Technology 10, Nr. 4 (04.05.2022): 621–28. http://dx.doi.org/10.24925/turjaf.v10i4.621-628.4696.

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In this study, alkali dietary fiber extraction method was evaluated to obtain soluble and insoluble dietary fiber from Trigonella-foenum graecum L. (fenugreek) seeds. The process conditions of alkali extraction method ensuring the highest total dietary fiber yield were investigated by response surface methodology. Furthermore, some physicochemical and functional properties of extracted soluble and insoluble dietary fiber from fenugreek seeds such as water retention capacity, oil adsorption capacity, swelling capacity, glucose adsorption index and α-amylase inhibition capacity were determined. Total dietary fiber yield was 78% at 52.50 g/L of sample: NaOH ratio and 1.01 M NaOH concentration as the optimum process conditions. Furthermore, insoluble dietary fiber gave better results than soluble dietary fiber when physicochemical and functional properties were compared.

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Mitrofanov, Dmitriy, Nataliya Budnikova und Marat Giniyatullin. „Quality indicators of compositions from drone brood and royal jelly“. E3S Web of Conferences 510 (2024): 01030. http://dx.doi.org/10.1051/e3sconf/202451001030.

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The purpose of the work was to compare two technological methods for preparing a combined product from royal jelly and drone brood. Methodology. The research was carried out at the Federal Scientific Center for Beekeeping. The material for the research was dry adsorbed drone brood, dried adsorbed royal jelly, compositions of royal jelly and drone brood prepared in two ways. The first method was the joint adsorption of royal jelly and drone brood, and the second was separate adsorption and drying followed by joint dry granulation of the components. The data obtained show that the differences in the physicochemical parameters of the products obtained by different methods are insignificant. The composition has intermediate values of physicochemical parameters between drone brood and royal jelly.

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Silina, E. V., N. E. Manturova, A. G. Erokhina, E. A. Shatokhina und V. A. Stupin. „Nanomaterials based on cerium oxide nanoparticles for wound regeneration: a literature review“. Russian Journal of Transplantology and Artificial Organs 26, Nr. 1 (28.12.2023): 113–24. http://dx.doi.org/10.15825/1995-1191-2024-1-113-124.

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Objective: to analyze data on the synthesis and properties of cerium oxide nanoparticles, as well as the prospects of its application in regenerative medicine for wound healing. Methodology. World literature was reviewed using PubMed, SCOPUS, ResearchGate, CyberLeninck, and Elibrary databases, as well as manual searches for authors and reference lists. Key search terms were «cerium oxide» AND nano* AND (healing OR regeneration OR repair) AND wound». The timeline was from the date of publication through August 2023. Results. The final analysis included 59 sources containing information on the synthesis and size of nanoparticles (and/or other physicochemical characteristics), methodology and results of in vivo and in vitro studies on the efficacy and/or safety of nanoceria for wound regeneration. It is shown that despite the progressive growth of research interest over the last 15 years, the actual use of nanoceria in practical medicine is still not widespread. This is due to a wide variety of non-standardized synthesis methods and conditions, resulting in the variability of physicochemical parameters of nanoparticles (size, form), thereby affecting the safety and biomedical efficacy of nanoceria. Regeneration mechanisms, including the antioxidant-prooxidant, anti-inflammatory and antimicrobial effects of nanoceria, which contribute to accelerated wound healing, are discussed. The severity of the regenerative effects depends on the method and conditions of synthesis, hence the resulting physicochemical characteristics of the nanoparticles. Therefore, after each batch, newly synthesized nanoceria needs physicochemical and biomedical experimental tests. Conclusion. Nanoceria has great potential in tissue engineering for regenerative medicine, particularly for healing of various kinds of wounds. Having developed a technology for standardized synthesis for effective and safe nanoceria (of the right form and size) on a production scale, it can be introduced in medicine, possibly improving the outcomes of treatment of many diseases and pathologies. The authors present conclusions on the results of the study of nanoceria for accelerating qualitative regeneration and the requirements for nanoparticles obtained during synthesis.

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Kiran, Patil Rajvardhan, Abhijit Kar, Rabi Narayan Sahoo und Arunkumar T. V. „Robust NIRS Models for Non-Destructive Prediction of Physicochemical Properties and ageing of Basmati Rice“. International Journal of Environment and Climate Change 13, Nr. 10 (29.09.2023): 4394–405. http://dx.doi.org/10.9734/ijecc/2023/v13i103116.

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Aim: To determine physicochemical properties and age of rice by non-destructive technique. Place and Duration of Study: Study was conducted at Division of Food Science and Postharvest Technology, Indian Agricultural Research Institute, New Delhi during 2020 to 2021. Methodology: Rice were kept for accelerated aging at 42.6°C temperature & 71% RH for a duration of 30 days. Changes in four physicochemical properties namely amylose content, volume expansion ratio (VER), water absorption ratio (WAR), and kernel elongation ratio (KER) were evaluated destructively (by spectrophotometer and cooking method) and non-destructively (by spectroradiometer) at every alternate day, during 30 days storage. Results: The physicochemical parameters of rice showed a good correlation with spectral signatures. Subsequently, Principal component Analysis (PCA), Partial Least Square Regression (PLSR), and Multiple Linear Regression (MLR) were used to model the physicochemical changes occurring during the process of accelerated aging using spectral reflectance values. Based on values of Coefficient of determination (R²) and Root mean square error (RMSE) accuracy of models was determined. Predictions with the MLR model resulted in a coefficient of determination (R2) of 0.82, 0.87, 0.9,7, 0.83 and 0.82 with root mean square error (RMSE) of 0.18, 0.13, 0.21, 0.124 and 4.2 for amylose content, VER, WAR, KER, and ageing process respectively for calibration. Conclusion: The study demonstrated the potential of NIRS in non-destructively predicting the physiochemical parameters of rice.

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Younis, Mahmoud, Khaled A. Ahmed, Isam A. Mohamed Ahmed, Hany M. Yehia, Diaeldin O. Abdelkarim, Abdulla Alhamdan, Ahmed Elfeky und Mansour N. Ibrahim. „Response Surface Methodology (RSM) Optimization of Pulsed Electric Field (PEF) Pasteurization Process of Milk-Date Beverage“. Processes 11, Nr. 9 (07.09.2023): 2688. http://dx.doi.org/10.3390/pr11092688.

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Milk beverage with added natural sweetener is well appreciated by consumers as a nutritious and healthy product with unique sensorial quality attributes. However, this product requires a suitable pasteurization method without significant impact on the sensorial and physicochemical quality characteristics of the product. This study optimizes the pulsed electric filed (PEF) conditions for the pasteurization of a milk-date beverage with conserved physicochemical quality properties. The effect of process variables, such as pulse off time (20, 30, and 40 μs), number of pulses (20, 50, and 80), powder ratio (10, 15, 20, and 25% w/w), storage time (2, 4, and 6 days), and storage temperature (5, 15, and 25 °C) on the responses of total viable count (TVC), color difference (∆E), pH, and total soluble solids (TSS) was evaluated using the RSM central composite design (CCD). Pulse off time, number of pulses, date powder/milk ratio (w/w), storage time, and storage temperature greatly impacted the microbial and physical properties of the beverage. The optimal conditions for decreasing the microbiological load and physical change of beverages were a pulse off time of 40 μs, number of pulses of 80, and storage temperature of 5 °C for all powder ratios. These variables gave a safe beverage for up to six days. At optimal conditions, the values of pH, TSS, ∆E, and TVC were 7.51, 15.44 °Brix, 18.01, and 0.138 Log 10 CFU/mL, respectively, for the powder ratio of 10% (w/w); 7.66, 18.6 °Brix, 21.46, and 0.284 Log 10 CFU/mL, respectively, for the powder ratio of 15% (w/w); 7.56, 21.52 °Brix, 25.24, and 0.577 Log 10 CFU/mL, respectively, for the powder ratio of 20% (w/w); and 7.2, 24.2 °Brix, 29.34, and 0.741 Log 10 CFU/mL, respectively, for the powder ratio of 25% (w/w).

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Sharma, Sanya, Pallawi Joshi, Shubhendra Singh und Anil Kumar Chauhan. „Development of functional golden milk by incorporating Curcuma amada andstevia by Response Surface Methodology“. Indian Journal of Dairy Science 76, Nr. 6 (2023): 569–77. http://dx.doi.org/10.33785/ijds.2023.v76i06.008.

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The objective of this study was to develop and optimize golden milk using the incorporation of Curcuma amada and stevia into the milk and preserve it using pasteurization. The analysis was carried out by incorporating Curcuma amada powder and stevia in the milk and optimizing using the Response surface methodology. A set of thirteen experiments were done in which optimized golden milk with the maximum desirability was produced using 3.43 percent Curcuma amada and 0.35 percent stevia, according to the outcomes of the variable optimization. The physicochemical and biochemical characteristics of the milk were also accessed. The antioxidant activity of Functional golden milk is 56.14and total phenolic content was found to be38.04 to36.95 mg GAE. The product was accessed for its shelf life using a sensory score and found that it was stable for 7 days at 4°C.

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He, Huaqi, Minxiang Liu und Shengjuan Jiang. „Antioxidant responses of Hericium erinaceus ingredients based on response surface methodology“. International Food Research Journal 28, Nr. 2 (01.04.2021): 283–93. http://dx.doi.org/10.47836/ifrj.28.2.08.

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Hericium erinaceus, a type of wood-rotting mushroom with many bioactive compounds, is effective to prevent and treat many human diseases. In order to acquire more bioactive materials, evaluation of extraction efficiencies, influencing factors, and available antioxidant activities of water and ethanol extractions were investigated by response surface methodology. The antioxidant activities (reducing power, scavenging activities of DPPH, superoxide anion radical, and hydroxyl radicals) and material contents (protein, polyphenol, and flavonoid) were optimised by a Box-Behnken design. The results showed that extraction temperature and solid-liquid ratio were the dominant factors in influencing most responses. In addition, it was difficult to maximise all of the responses simultaneously under any set of condition groups. Flavonoid was the main contributor to the scavenging activity of DPPH and superoxide anion, while protein and polyphenol majorly affected the reducing power and scavenging activity of hydroxyl radicals. The antioxidant activities of the same fruiting bodies were related to extraction conditions, chemical constitutions, and physicochemical properties of the extractions. Following these results, further research on the extracts to identify important bioactive compounds for potential nutraceutical and medicinal use is underway.

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Tkachenko, S. N., I. S. Tkachenko, L. A. Gribelyuk und E. B. Silinina. „Strategizing of vanguard physicochemical and biological technologies for water treatment in Kuzbass (technological aspect)“. Russian Journal of Industrial Economics 13, Nr. 3 (27.09.2020): 375–88. http://dx.doi.org/10.17073/2072-1633-2020-3-375-388.

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The authors use Kuzbass as the example to study strategic approach and methodology of choosing and implementing vanguard (perspective) physicochemical and biological technologies for water treatment plants. They also examine the requirements for purification and disinfection of drinking and waste waters under present conditions characterized by increased anthropogenic loads. These procedures should be carried out with controlling a number of new types of dangerous contaminants. Currently there is no provision for systematic analysis of their presence in water sources before and after their treatment. The authors study the interrelation between forecasting, strategizing, target programming, project management of planning and realization of the priority of implementation of vanguard physicochemical and biological technologies of vanguard physicochemical and biological technologies for water treatment at the water supply and drainage utilities. In the strategic study the authors adduce the overview of perspective trends of development of vanguard physicochemical and biological technologies and the examples of their technical realization which allow fulfilling the strategy’s priority under study within the set of priorities “Development strategy of life supply systems (water supply and water waste). Water utilities as “green economy” translators”. The article studies the levels of water quality control as well as common approaches to building regional water quality control centres and implementing online water quality control. The authors adduce the main competitive advantages that the Kemerovo region possesses to fulfill the priority. Strategizing of the implementation of vanguard physicochemical and biological technologies will provide the opportunity for realizing long-term (up to 15 years long) target programs in water supply and drainage areas in order to improve the performance of water industry.

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Younis, Mahmoud, Isam A. Mohamed Ahmed, Khaled A. Ahmed, Hany M. Yehia, Diaeldin O. Abdelkarim, Assem I. Zein El-Abedein und Abdulla Alhamdan. „Response Surface Methodology (RSM) Optimization of the Physicochemical Quality Attributes of Ultraviolet (UV-C)-Treated Barhi Dates“. Plants 11, Nr. 17 (05.09.2022): 2322. http://dx.doi.org/10.3390/plants11172322.

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Barhi date fruit is one of the most important fruits that has high consumer preference and market value at the Khalal maturity stage. However, this stage is very short and the fruit is vulnerable to decay and the ripening process under improper handling and storage conditions. Thus, the purpose of this study was to evaluate the feasibility of utilizing ultraviolet (UV-C) as a method to preserve the qualitative features of Barhi dates under various storage circumstances. The core of this study was defining the best conditions for UV-C treatment of Barhi dates, which was accomplished using a response surface methodology (RSM) model with a central composite, rotating four-factors-mixed-levels design (CCRD). The impacts of independent variables [UV-C exposure time (1, 2, 3, 4 min), UV-C dose (1, 3, 5, 7 kJ/m2), storage time (1, 6, 11, 16, 21 days) and storage temperature (1, 5, 15, 25 °C)] on the moisture content (MC), total soluble solids (TSS), total color changes (E), firmness, total phenolic content (TPC), total viable count (TVC), DPPH antiradical activity, fructose and glucose were investigated. The results revealed that the optimum UV-C treatment and storage settings for keeping the quality features of the dates were the UV-C exposure period and dosage of 1 min and 2.07 kJ/m2, and the storage time and temperature of 18 days and 12.36 °C, respectively. At the optimum conditions, the values of 59.66% moisture content, 38.24% TSS, 60.24 N firmness value, 48.83 ΔE, 0.07 log CFU/g TVC, 5.29 mg GAE/g TPC, 56.32% DPPH antiradical activity, 6.87 g/100 g fructose and 14.02 g/100 g glucose were comparable predicted values demonstrating the suitability of the used RSM models. Overall, the perfect UV-C treatment and storage circumstances for extending the storability and shelf life and maintaining the quality features of Barhi dates were identified in this study.

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Meireles, Mariana R., Lara H. Stelmach, Eliane Bandinelli und Gustavo F. Vieira. „Unveiling the influence of factor VIII physicochemical properties on hemophilia A phenotype through an in silico methodology“. Computer Methods and Programs in Biomedicine 219 (Juni 2022): 106768. http://dx.doi.org/10.1016/j.cmpb.2022.106768.

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Moghaddam, Arasb Dabbagh, Milad Pero und Gholam Reza Askari. „Optimizing spray drying conditions of sour cherry juice based on physicochemical properties, using response surface methodology (RSM)“. Journal of Food Science and Technology 54, Nr. 1 (Januar 2017): 174–84. http://dx.doi.org/10.1007/s13197-016-2449-8.

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Guillamon Ayala, Enrique, Borja Domínguez Martín, Nuria Mut-Salud, Javier M. Ochando-Pulido, José Antonio Morales-González, Alberto Baños Arjona und Antonio Martinez-Ferez. „Optimization of an onion oil microemulsion by response surface methodology for enhanced physicochemical stability and biological activity“. LWT 194 (Februar 2024): 115809. http://dx.doi.org/10.1016/j.lwt.2024.115809.

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Sotomayor Vinan, Pablo Andres, Monik Manish Ruparel, Resha Tandukar und Pranabendu Mitra. „Optimization of Coffee-Gelatin Shot Formulations Based on Physicochemical, Rheological and Sensory Properties Using Response Surface Methodology“. Journal of Food Industry 7, Nr. 1 (07.12.2023): 54. http://dx.doi.org/10.5296/jfi.v7i1.21518.

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The objective of this study was to optimize the coffee content and alcohol content of the formulations of coffee-gelatin shots based on physicochemical, rheological and sensory properties of the products. Because the coffee content and alcohol content influenced those properties of coffee-gelatin shots significantly which were related to the consumers’ acceptance. Thirteen different coffee-gelatin shots for nine formulations based on CCRD were developed and the sensory properties (overall acceptability, color, flavor and texture), L-value, pH and viscosity of coffee-gelatin shots were determined. The regression models were developed to predict the response variables as a function of independent variables. The response surface models were developed to understand the effects of independent variables on the responses. A desirability function was used to determine an optimum formulation using a numerical optimization technique. All contour plots of response surface models were superimposed to visualize an optimum region. The regression models could predict the sensory properties, L-value, pH and viscosity of coffee-gelatin shots as a function of coffee content and alcohol content with an accuracy of 77-99% depending on the properties of coffee-gelatin shots. The coffee content and alcohol content affected the sensory properties, L-value and viscosity of coffee-gelatin shots significantly (p<0.05). The optimization results obtained using numerical and graphical optimization techniques indicated that a combination of coffee (2.50 -3.00 g) and alcohol (5.25-6.75 mL) was the optimum formulation of a coffee-gelatin shots that improved the sensory properties, L-value, pH and viscosity of the coffee-gelatin shots. This optimum formulation of coffee-gelatin shots is expected to be useful for commercial manufacturing of consumers’ desired coffee-gelatin shots.

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Martínez, Maritza Coromoto, Antonio José Vera, Juan Carlos Parra, Olga Beltrán und Angel Morillo. „Physicochemical and functional parameters of Cochlospermum vitifolium (bototo) gum exudate“. International Journal of Food and Allied Sciences 2, Nr. 2 (12.12.2016): 42. http://dx.doi.org/10.21620/ijfaas.2016242-48.

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The physicochemical parameters of Cochlospermum vitifolium they were evaluated and were linked to certain functional properties of industrial interest. The physicochemical parameters were determined by the classic methodology used for carbohydrates and the functional properties, as reported in the literature. The results obtained showed that the gum object of this study is low soluble in water, which corresponds with relatively high values of swelling indexes and water absorption capacity. Also, the intrinsic viscosity of the C. vitifolium exudate was related to a high molar mass, in the order of 106. Its emulsifying capacity is high, which is attributed to hydrophobic groups present in its structure. The gum gels at a minimum concentration, similar to that of the gum karaya (4.5%), but the gel that forms agglomerates, it is not uniform. The C. vitifolium gum exhibits important physicochemical and functional parameters which could serve as a criterion for testing its use in various industries.

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Onufrak, Aaron, Megan A. Rúa und Katie Hossler. „The Missing Metric: An Evaluation of Fungal Importance in Wetland Assessments“. Wetlands 40, Nr. 4 (21.11.2019): 825–38. http://dx.doi.org/10.1007/s13157-019-01228-w.

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AbstractTo preserve wetland ecosystem function, federal and state agencies have developed assessment procedures to better manage remaining wetland areas. Currently, wetland assessments do not consider microorganisms when determining wetland quality. This is notable, because fungi are often the primary decomposers of organic material and thus important players in nutrient cycling. The objective of this study is to quantify how wetland quality, as measured using the Ohio Rapid Assessment Method (ORAM), relates to fungal community composition. We sampled soils from six depressional emergent marshes in Ohio belonging to each of the three ORAM quality categories, assessed soil physicochemical properties, and recovered fungal DNA. We then determined if wetland quality as expressed by the ORAM reflects soil health. Our results indicate that ORAM scoring methodology significantly explains differences in fungal community composition between wetlands. We also found that soil physicochemical properties not currently included in the ORAM are strong drivers of fungal community composition, particularly bulk density, pH, soil organic matter, and soil moisture. Overall, our results suggest fungal community composition reflects wetland quality as assessed by the ORAM, and that the ORAM and potentially other wetland assessments could better capture the soil environment by including easily measured soil physicochemical properties.

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